Indian cricketer Yuvraj Singh is undergoing chemotherapy in the U.S. after a rare tumor near his lungs was diagnosed as malignant. The 30-year-old all-rounder made his debut for India in a One-Day International against Kenya in 2000. A powerful batsman and canny bowler, Yuvraj played a starring role in India's march to World Cup glory last year, and was named man of the tournament. Pictured, Yuvraj kissed the ICC World Cup trophy outside the Taj Mahal Palace hotel in Mumbai, April 3, 2011, the day after India .

Indian cricketer Yuvraj Singh is undergoing chemotherapy in the U.S. after a rare tumor near his lungs was diagnosed as malignant. The 30-year-old all-rounder made his debut for India in a One-Day International against Kenya in 2000. A powerful batsman and canny bowler, Yuvraj played a starring role in India's march to World Cup glory last year, and was named man of the tournament. Pictured, Yuvraj kissed the ICC World Cup trophy outside the Taj Mahal Palace hotel in Mumbai, April 3, 2011, the day after India .

Yuvraj has been a crucial part of India's middle order, particularly in ODIs, a format in which he has scored 8,051 runs for his country. He last played for India in a November Test match against the West Indies in Kolkata. Pictured, Yuvraj celebrated as India beat Australia by five wickets in the World Cup quarter-final, March 24, 2011.

Yuvraj has been a crucial part of India's middle order, particularly in ODIs, a format in which he has scored 8,051 runs for his country. He last played for India in a November Test match against the West Indies in Kolkata. Pictured, Yuvraj celebrated as India beat Australia by five wickets in the World Cup quarter-final, March 24, 2011.

Yuvraj hasn't played an ODI since the April 2 World Cup final in Mumbai. He was at the non-striker's end when captain Mahendra Singh Dhoni hit a six to win the match. Yuvraj was the star of the tournament, scoring 362 runs and claiming 15 wickets. Pictured, Yuvraj with his 'Man of the Tournament' trophy after the World Cup final in Mumbai's Wankhede Stadium, April 2, 2011.

Yuvraj hasn't played an ODI since the April 2 World Cup final in Mumbai. He was at the non-striker's end when captain Mahendra Singh Dhoni hit a six to win the match. Yuvraj was the star of the tournament, scoring 362 runs and claiming 15 wickets. Pictured, Yuvraj with his 'Man of the Tournament' trophy after the World Cup final in Mumbai's Wankhede Stadium, April 2, 2011.

Yuvraj was named 'Man of the Match' an astonishing four times in a row during the World Cup, and he became only the fourth player in history to score 300 or more runs and take 10 or more wickets in a single World Cup. Shown, Yuvraj laughed after receiving the 'Man of the Match' medal for his performance in an ODI against New Zealand at Chennai's M.A. Chidambaram Stadium, Dec. 10, 2010.

Yuvraj was named 'Man of the Match' an astonishing four times in a row during the World Cup, and he became only the fourth player in history to score 300 or more runs and take 10 or more wickets in a single World Cup. Shown, Yuvraj laughed after receiving the 'Man of the Match' medal for his performance in an ODI against New Zealand at Chennai's M.A. Chidambaram Stadium, Dec. 10, 2010.

Yuvraj is most celebrated as a big-hitting batsman, but he is also a supremely talented bowler, with 109 ODI wickets to his name, and a further nine in Tests and eight in Twenty20s. Pictured, Yuvraj and Dhoni celebrated after he dismissed Pakistani batsman Abdul Razzaq during an ODI in Visakhapatnam, Andhra Pradesh, April 5, 2005.

Yuvraj is most celebrated as a big-hitting batsman, but he is also a supremely talented bowler, with 109 ODI wickets to his name, and a further nine in Tests and eight in Twenty20s. Pictured, Yuvraj and Dhoni celebrated after he dismissed Pakistani batsman Abdul Razzaq during an ODI in Visakhapatnam, Andhra Pradesh, April 5, 2005.

Yuvraj has thrived in T20 cricket, representing Kings XI Punjab and Pune Warriors in the Indian Premier League, and playing 23 times for India. Pictured, Yuvraj played a shot during an IPL match against his former team at Punjab Cricket Association Stadium in Mohali, May 8, 2011.

Yuvraj has thrived in T20 cricket, representing Kings XI Punjab and Pune Warriors in the Indian Premier League, and playing 23 times for India. Pictured, Yuvraj played a shot during an IPL match against his former team at Punjab Cricket Association Stadium in Mohali, May 8, 2011.

Yuvraj became part of an elite handful of players to achieve the incredible feat of hitting six sixes in an over. He did this during the 2007 T20 World Cup against English bowler Stuart Broad, who is now captain of England's T20 team but no doubt still has nightmares of Yuvraj sending the ball sailing back over his head that day. Pictured, fans celebrated as Yuvraj smashed the sixes at Kingsmead Stadium in Durban, South Africa, Sept. 19, 2007.

Yuvraj became part of an elite handful of players to achieve the incredible feat of hitting six sixes in an over. He did this during the 2007 T20 World Cup against English bowler Stuart Broad, who is now captain of England's T20 team but no doubt still has nightmares of Yuvraj sending the ball sailing back over his head that day. Pictured, fans celebrated as Yuvraj smashed the sixes at Kingsmead Stadium in Durban, South Africa, Sept. 19, 2007.

Yuvraj has played 37 Test matches for India, scoring a total of 1,775 runs, with a highest score of 169 against Pakistan in Bangalore on Dec. 8, 2007. He has scored three centuries in his Test career, all against Pakistan. Pictured, Yuvraj hit the ball past Alistair Cook during a Test at Trent Bridge in Nottingham, England, July 30, 2011.

Yuvraj has played 37 Test matches for India, scoring a total of 1,775 runs, with a highest score of 169 against Pakistan in Bangalore on Dec. 8, 2007. He has scored three centuries in his Test career, all against Pakistan. Pictured, Yuvraj hit the ball past Alistair Cook during a Test at Trent Bridge in Nottingham, England, July 30, 2011.

The all-rounder is an ambassador for many prominent brands, including Reebok, Pepsi and Birla Sun Life Insurance. He has also modelled for several well-known designers, making him one of the style icons of Indian cricket. Shown, Yuvraj at a launch event for a limited edition 'Yuvraj' watch series by Swiss watchmakers Ulysse Nardin, Mumbai, Dec. 11.

The all-rounder is an ambassador for many prominent brands, including Reebok, Pepsi and Birla Sun Life Insurance. He has also modelled for several well-known designers, making him one of the style icons of Indian cricket. Shown, Yuvraj at a launch event for a limited edition 'Yuvraj' watch series by Swiss watchmakers Ulysse Nardin, Mumbai, Dec. 11.